Q :- How to use ID selector with jQuery ?Ans : $("#id").css('color','red');Demo
Q :- How to use class selector with jQuery ?Ans : $(".class").css('color','red');Demo
Q :- How to use element selector with jQuery ?Ans : $("p").css('color','red');Demo
Q :- How to select elements with two classes ?Ans :- $(".class1.class2").css('color','red');
Q :- How to select all anchor tags having href attribute ?Ans :- We can use attribute selector of jQuery.
$("[href]").css('color','red');Demo
Q :- How to select anchor tag with href attribute value set to Word.html ?Ans : We can use Attribute Value selector. This selector selects the elements on page with specified attribute value.
$("[href = 'world.html']").css('color','red');Demo
Q :- How to select all paragraph elements having text 'hello' in it ?Ans : We can use element selector to select all the paragraph elements ans the can use contains selector to filter paragraph elements with specified text.
$("p:contains('hello')").css('color','red')Demo
Q :- How to select checked checkboxes from the page ?Ans : $(":checked")Demo
Q :- How to select third li element from the list of 10 li elements ?Ans : We can use equal selector. $("ul li:eq(2)").css('color','red') The index start from 0.Demo
Q :- How to select even tr's of table ?Ans : $("tr:even").css('color','red') or for selecting even paragraph elements we can use : $("tr:even").css('color','red')Demo

Q :- How to select odd tr's of table ?Ans : $("tr:odd").css('color','red') or for selecting odd paragraph elements we can use : $("tr:odd").css('color','red')Demo

Q :- How to select first paragraph element on the page ?Ans : $('p:first').css('color','red')Demo
Q :- How to select last div element on the page ?Ans : $('div:last').css('color','red')Demo
Q :- How to select all li elements with position or index greater than 2 ?Ans : $("ul li:gt(2)").css('color','red')Demo
Q :- How to select all li elements with position or index less than 2 ?Ans : $("ul li:lt(2)").css('color','red')Demo
Q :- How to select all p elements on page except first ?Ans : $("p :not(:first)").css('color','red')Demo